Alexander Hamilton Institute
Alexander Hamilton Institute, 1971
Buku Referensi
Peter C. Anderson
McGraw-Hill, 1992
Buku Teks
Howell, Rate A., author
The Dryden Press, 1984
Buku Teks
Globerman, Steven
Prentince-Hall, 1986
Buku Teks
Miller, Roger LeRoy, author
Thomson West, 2007
Buku Teks